Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of n-p heterogeneous mesoporous spherical gas-sensing material

A gas-sensitive material, n-p technology, applied in the direction of material resistance, material analysis, material analysis through electromagnetic means, etc., can solve the problems of high price, slow response speed, complex structure, etc., and achieve low price, high sensitivity, and preparation means simple effect

Active Publication Date: 2019-08-06
CHINA JILIANG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commercial NO 2 The sensor is mainly based on the electrochemical principle, its structure is complex, expensive, and the response speed is slow

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of n-p heterogeneous mesoporous spherical gas-sensing material
  • A kind of preparation method of n-p heterogeneous mesoporous spherical gas-sensing material
  • A kind of preparation method of n-p heterogeneous mesoporous spherical gas-sensing material

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0012] Specific embodiment one: a kind of preparation method of n-p heterogeneous mesoporous spherical gas-sensing material, specifically finish according to the following steps: 1, the Ni(NO of 1g and the FDU-12 of 4.85g 3 ) 2 ·6H 2 O put into a polytetrafluoroethylene cup, add 20ml of alcohol and 20ml of n-hexane and stir until powdered; 2. Put the obtained powder in a muffle furnace for calcination at 200°C for 6 hours, and obtain the oxide precursor in the ball channel, and put it on the outer surface of the template Ni(NO 3 ) 2 ·6H 2 O; 3. After the sample is cooled, wash away the Ni(NO) on the outer surface of the template with deionized water 3 ) 2 ·6H 2 O; 4. Put the sample obtained in step 3 into a polytetrafluoroethylene cup, add a certain amount of sodium dodecylsulfonate, distilled water and n-hexane and stir for 2 hours, then add 5.84g of SnCl 4 ·5H 2 O and stirred to powder, then placed in a muffle furnace for calcination at 500°C for 8 hours, after the s...

specific Embodiment approach 2

[0013] Specific embodiment two: a kind of preparation method of n-p heterogeneous mesoporous spherical gas-sensing material, specifically finish according to the following steps: 1, the Ni(NO of 2g and the FDU-12 of 4.85g 3 ) 2 ·6H 2 O put into a polytetrafluoroethylene cup, add 20ml of alcohol and 20ml of n-hexane and stir until powdered; 2. Put the obtained powder in a muffle furnace for 250°C and calcinate for 2 hours to obtain the oxide precursor in the raceway Ni(NO 3 ) 2 ·6H 2 O; 3. After the sample is cooled, wash away the Ni(NO) on the outer surface of the template with deionized water 3 ) 2 ·6H 2 O; 4. Put the sample obtained in step 3 into a polytetrafluoroethylene cup, add a certain amount of sodium dodecylsulfonate, distilled water and n-hexane and stir for 2 hours, then add 1.46g of SnCl 4 ·5H 2 O and stirred to powder, then placed in a muffle furnace for calcination at 700 °C for 4 h, after the sample was cooled, the FDU-12 template was removed with 4 mol...

specific Embodiment approach 3

[0014] Specific embodiment three: a kind of preparation method of n-p heterogeneous mesoporous spherical gas-sensing material, specifically is finished according to the following steps: 1, the Ni(NO of 4g FDU-12 and 4.85g 3 ) 2 ·6H 2 Put O into a polytetrafluoroethylene cup, add 20ml of alcohol and 20ml of n-hexane and stir until powdered; 2. Put the obtained powder in a muffle furnace for calcination at 220°C for 4 hours, and obtain the oxide precursor in the ballway, and place it on the outer surface of the template Ni(NO 3 ) 2 ·6H 2 O; 3. After the sample is cooled, wash away the Ni(NO) on the outer surface of the template with deionized water 3 ) 2 ·6H 2 O; 4. Put the sample obtained in step 3 into a polytetrafluoroethylene cup, add a certain amount of sodium dodecylsulfonate, distilled water and n-hexane and stir for 2 hours, then add 2.92g of SnCl 4 ·5H 2 O and stirred to powder, then placed in a muffle furnace for calcination at 600 °C for 6 h, after the sample ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of an n-p heterotypic mesoporous spherical gas-sensing material and relates to a preparation method of an n type SnO2 loaded p type mesoporous spherical metallic oxide NiO gas-sensing material. The preparation method comprises the following steps: by taking ordered mesoporous silica FDU-12 as a template, utilizing a nano-copy method to synthesize a mesoporous spherical NiO precursor, and then utilizing a modification impregnation method to load SnO2 on the surface of the NiO to obtain the n-p heterotypic mesoporous spherical gas-sensing material. By adopting the preparation method, on one hand, the gas sensitivity is improved by increasing the superficial area through a mesoporous structure, and on the other hand, the sensitivity and the selectivity of the gas-sensing material aiming to specific gas are improved by regulating and controlling n-p heterotypic interface electronic transmission. The preparation method adopted by the invention is wide in raw material source, low in cost and simple in chemical preparation means; and the obtained n-p heterotypic mesoporous spherical gas-sensing material is high in sensitivity and strong in selectivity.

Description

technical field [0001] The invention relates to the field of gas sensitive materials, in particular to an n-p heterogeneous mesoporous spherical SnO 2 / NiO gas-sensitive material preparation method. Background technique [0002] In recent years, with the rapid growth of my country's car ownership, a large amount of NOx (mainly NO 2 and NO), will seriously affect the air quality, causing PM2.5 to soar. In response to the increasingly prominent problem of air pollution, the country officially implemented the "Law of the People's Republic of China on the Prevention and Control of Air Pollution" on January 1, 2016. Therefore, the prevention and control of air pollution and the monitoring of gas pollution sources are of high urgency. At present, the commercial NO 2 The sensor is mainly based on the principle of electrochemistry, its structure is complicated, the price is expensive, and the response speed is slow. Therefore, the development of NO 2 Rapid, high-sensitivity, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 徐靖才王攀峰王新庆洪波彭晓领金红晓金顶峰李静杨艳婷
Owner CHINA JILIANG UNIV